JPS63149484A - Flow passage changeover valve - Google Patents

Abstract

PURPOSE:To change over outgoing passages for a reserved fluid by determining the working direction of a rotary combined force on a liquid clutch, depending upon the rotary direction of an eddy flow generated in the fluid. CONSTITUTION:When a d.c. motor 11 has been driven, the eddy flow of a washing liquid generated via the turning force of a pump impeller 13 works upon a turbine runner 14. The rotary direction of the turbine liner 14 is determined by the eddy flow direction of the washing liquid. If the turbine runner 14 turns in a counter-clockwise direction, the valve seat 16b of a flow passage changeover valve 16 monolithically mounted on the runner 14 turns and comes in contact with the opening of an outgoing passage 18 for the closing thereof. Therefore, the washing liquid flushes via another outgoing passage 19 against a check-valve 19a.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a flow path switching valve suitable for use in an on-vehicle washer system.

[Conventional technology]

Conventionally, vehicles have been equipped with front and rear window washer systems as shown in FIG. In the figure, 1 is a washer jar that stores washer fluid, 2 is a washer motor, 3 is a solenoid valve for flow path switching, 4 is a front washer nozzle, 5 is a rear washer nozzle, and 6 is an inflow/outflow of washer fluid. It is a conduit hose that forms a passage.

In the washer system configured in this way,
By driving the washer motor 2, a water flow is generated in the washer liquid in the washer jar 1, and the outflow direction of this water flow is selected by the flow path switching electromagnetic valve 3, and the water is ejected from the front washer nozzle 4 or the rear washer nozzle 5. I try to do that. That is, when the flow path switching electromagnetic valve 3 is in the OFF state, its inflow passage 3a and outflow passage 3b are in communication (FIG. 6 fa)), and the washer liquid flowing through the inflow passage 3a flows into the outflow passage. 3b, and is guided to the front washer nozzle 4 where it is ejected. On the other hand, when the flow path switching electromagnetic valve 3 is turned on, the valve 3d is attracted, the outflow path 3b is closed, and the inflow path 3a and outflow path 3C are connected. The washer fluid flowing out through the outflow passage 3c is guided to the rear washer nozzle 5 and ejected.

[Problem that the invention seeks to solve]

However, according to such a conventional washer system, when the washer liquid is ejected through the rear washer nozzle 5, the flow path switching solenoid valve 3 must be kept energized. The power consumption was excessive. Further, since the washer motor 2 and the flow path switching electromagnetic valve 3 are each configured separately, there are problems in that the cost increases and the weight increases.

[Means for solving problems]

The present invention has been made in view of these problems, and includes a fluid clutch which is rotatably connected to the rotating shaft of a rotating machine that generates a vortex in the stored fluid via this vortex, and which prevents the outflow of the stored fluid. First and second outflow ports forming a passage are provided, and the first outflow port is biased to be closed by a clockwise rotational coupling force acting on the fluid clutch via the vortex flow, and the first outflow port is biased to be closed in a counterclockwise direction. The second outlet is biased to close by the rotational coupling force in the direction.

[Effect]

Therefore, according to the present invention, the direction of the rotational coupling force acting on the fluid clutch can be determined by the rotational direction of the vortex generated in the stored fluid, and the rotational coupling force in the clockwise direction causes the first outlet to be The second outflow port is biased to be closed by the clockwise rotational coupling force, and the outflow path of the stored fluid can be switched.

〔Example〕

Hereinafter, the flow path switching valve according to the present invention will be explained in detail.

FIG. 1 is a side sectional view showing one embodiment of this flow path switching valve. In the figure, 11 is a DC motor, 12 is a driving fan fixed to the tip of the output shaft 11a of this DC motor 11, 13 is a pump impeller built integrally with this driving fan 12, and 14 is this pump. A support shaft 14a loosely fitted into the impeller 13 and fixed to the housing 15
A turbine runner rotatably arranged around 1
6 is a flow path switching valve integrally fixed to this turbine runner 14 via an arm 16a, and 17 is a drive fan 12.
Pump impeller 13. A washer jar 2 is installed in a storage chamber 15a that houses a turbine runner 14 and a flow path switching valve 16.
0 (Fig. 3) is a communication passage that leads the washer fluid stored in the tank. The communication passage 17 is always in communication with the washer jar 20, so the storage chamber 15a is always filled with washer liquid. Further, as shown in FIGS. 2(a) and 2(b), the flow path switching valve 16 is composed of two valves 16b and 16c whose back surfaces are butted against each other, and each of the valves 16b and 16c is Outflow passages 18 and 19, each having an outflow port having a smaller diameter than the valves 16b and 16c, are formed at portions rotationally opposing the surface of the valves 16b and 16c. The washer fluid flowing out through the outflow passages 18 and 19 is guided to the front washer middle nozzle 4 and the rear washer nozzle 5 through the conduit hoses 6a and 6b in the washer system shown in FIG. ing. In addition, the outflow passages 18 and 19
The pump is equipped with check valves 18a and 19a, and the pump impeller 13 and turbine runner 14 form a fluid clutch.

Next, the operation of the flow path switching valve IO configured in this way will be explained. That is, in FIG.
When driven, a water flow is generated in the washer fluid filling the storage chamber 15a by the rotational force of the drive fan 12 coupled to the output shaft 11a. In addition, the drive fan 12
The pump impeller 13 is integrally constructed,
A vortex of the washer fluid created by the rotational force of the pump impeller 13 acts on the turbine runner 14 .

That is, the turbine runner 14 is connected to the pump impeller 13 via the washer fluid to form a fluid clutch, and the support shaft 1
4a as the center (in this embodiment, it rotates with a coupling efficiency of about 10 to 15%). The rotational direction of the turbine runner 14 is determined by the vortex direction of the washer liquid, that is, the rotational direction of the DC motor 11. FIG. 2(a) shows the operation when the turbine runner 14 rotates clockwise (rightward in the figure). shows,
FIG. 2(b) shows the operation when the turbine runner 14 rotates counterclockwise.

When the turbine runner 14 rotates counterclockwise, the valve 16b of the flow path switching valve 16, which is integrally attached to the turbine runner 14, rotates into contact with the opening of the outflow passage 18, closing the outflow passage 18, and (FIG. 2(a)), the clockwise rotational coupling force of the pump impeller 13 that continuously acts on the turbine runner 14 keeps the outflow passage 18 closed.

Therefore, the washer fluid flowing through the communication passage 17 flows out through the outflow passage 19 against the check valve 19a, is guided to the rear washer nozzle 5, and is ejected.

When the turbine runner 14 rotates counterclockwise,
The valve 16C of the flow path switching valve 16 rotates in contact with the opening of the outflow passage 19 and closes the outflow passage 19 (FIG. 2(b)), and the pump impeller 13 continues to act on the turbine runner 14. The counterclockwise rotational coupling force keeps the outflow passage 19 closed, and the washer fluid flows out through the communication passage 17 against the check valve 18a, is guided to the front washer nozzle 4, and is ejected.

FIG. 4 shows a drive circuit for the DC motor 11, with two circuits.
By using a three-contact changeover switch 21, the direction of rotation of the DC motor 11 can be varied as required, and the outflow path of the washer fluid can be switched.

As described above, according to the washer system according to this embodiment, the outflow passage of the washer fluid can be mechanically switched by obtaining the rotational force of the DC motor, so the solenoid valve for switching the flow passage, which was necessary in the past, is no longer required. , the power consumption can be reduced compared to the conventional method. Further, by integrating the direct current motor and the valve section, the cost can be reduced compared to the conventional structure in which the direct current motor and the valve section are constructed separately, and the weight can be significantly reduced.

In this example, a power reduction effect of 40% was obtained, a cost reduction effect of 40%, and a weight reduction effect of 100 g compared to the conventional method.

〔Effect of the invention〕

As explained above, according to the flow path switching valve according to the present invention, the rotating shaft of the rotating machine that generates the vortex flow in the stored fluid has a
The fluid clutch is rotatably coupled through the vortex flow, and first and second outlet ports are provided to form an outflow passage for the stored fluid, and clockwise rotation acting on the fluid clutch through the vortex flow is provided. Since the first outlet is biased to be closed by the coupling force, and the second outlet is biased to be blocked by the counterclockwise rotational coupling force,
The direction of the rotational coupling force acting on the fluid clutch can be determined by the rotational direction of the vortex generated in the stored fluid, and the rotational coupling force in the clockwise direction causes the first outlet to be rotated in the counterclockwise direction. It is now possible to block and energize the second outflow port with force and switch the outflow path of the stored fluid as appropriate, and the conventionally required solenoid valve is removed, resulting in reductions in power consumption, cost, weight, etc. reduction can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing an embodiment of the channel-broken pulp according to the present invention, FIG. 2 is a plan sectional view illustrating the operation of this channel switching valve, and FIG. 3 is this channel switching valve. Figure 4 is a diagram showing the drive circuit of the DC motor in this washer system, Figure 5 is a diagram showing the conventional configuration of a washer system in a vehicle, and Figure 6 is a diagram showing the configuration of a washer system applied to a vehicle. FIG. 3 is a side cross-sectional view illustrating the operation of a flow path switching electromagnetic valve used in the shaft system. 10... Flow path switching valve, 11... DC motor, l
la...output shaft, 12...drive fan, 13...
Pump impeller, 14...Turbine runner, 15a...
...Storage chamber, 16...Flow path switching valve, 16b, 16C.
... Valve, 17... Communication passage, 18.19... Outflow passage.

Claims (1)

[Claims] a rotating machine that generates a vortex in the stored fluid by the driving force of its rotating shaft; a fluid clutch that is rotatably coupled to the rotating shaft of the rotating machine via the vortex; and first and second fluid clutches that form an outflow passage for the stored fluid; A clockwise rotational coupling force acting on the fluid clutch through the vortex current forces the first outlet to close, and a counterclockwise rotational coupling force closes the second flow outlet. A flow path switching valve comprising a flow path switching valve that closes and energizes an outlet.